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Finding the Fourth Proportional to 59.45, 89.12 and 37.80

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Solution

The fourth proportional to 59.45, 89.12 and 37.80 is: 56.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    59.45 : 89.12 = 37.80 : x
  2. Step 2: Convert to fraction form
    59.45/89.12 = 37.80/x
  3. Step 3: Cross multiply
    59.45x = 89.12 × 37.80
  4. Step 4: Simplify right side
    59.45x = 3,368.83
  5. Step 5: Solve for x
    x = 3,368.83/59.45
  6. Step 6: Final answer
    x = 56.67

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.